All Clear I want to use, can my filter and UV lamp stay on?
Yes you can! The filter or UV lamp do not affect the operation of All Clear.
Lid of Cross Flow Biofill is bulging, how is this possible?
This is because the Cross-Flow Biofill is not a pressure filter you need to prevent too much pressure from clogging the filter, for example. The water cannot then flow sufficiently, causing the lid to bulge. Regular rinsing of the filter material will solve this problem. You can possibly order a new lid from the Velda […]
Can the Cross Flow Biofill be combined with another pump?
Velda maintains a maximum capacity for the Cross Flow Biofill so that too much pressure does not build up in the filter and the filter does not leak. Therefore, the following conditions apply: The water should be able to “freely” exit the filter the outlet must not be reduced to a smaller diameter the water […]
Bio-Oxydator, is an overdose harmful to the fish?
Bio-Oxydator is not harmful to your fish, plants or pond. Bio-Oxydator contains a water hardening agent (including lime) to slightly increase the hardness of the water on the bottom and a bacterial culture for breakdown of organic waste on the bottom. This product, which Velda has had in its range for a long time, is […]
Cross-Flow Biofill, the lid is not closing properly and leaking, what should I do?
Leaking with the Cross-Flow Biofill is almost always related to pressure building up or a larger amount of water flowing through the filter than the filter can handle. Since it is not a pressure filter, this must be prevented. Here are some points to check why the Cross-Flow Biofill is leaking: Check to see if […]
I have a Clear Control 50, but I am still suffering from floating algae, what should I do?
Regardless of the filter, green water (floating algae) should become clear with a UV-C Unit. Only if the pond is old with a lot of organic material on the bottom and an acidified environment will this not work. The effective life of a UV-C lamp is approximately 7500 hours of operation. With continuous use, the […]
Clear Control 25: Should it be left on all year?
We recommend turning off the filter in winter to prevent broken freezing. The rest of the year, the filter should be left on day and night. A bacterial culture forms in the filter that keeps the water clean, while the UV-C lamp kills the algae. The bacteria die when the filter is off for a […]
Cross Flow Biofill, which pond pump do I need with this?
In combination with the Cross-Flow Biofill we recommend the Green Line pump 5000 recommended. It has low energy consumption and long life. If another pump is already present, we recommend the following: Velda maintains a maximum capacity for the Cross-Flow Biofill so that too much pressure is not built up in the filter and the […]
T-Flow Tronic 35 gives code error 1 check water flow, what should I do?
Chances are that the conductivity of the water is too low and this can be measured by taking a mug of water and dissolving about 20 grains of salt in it. Then dip the green endcap with anode and cathode in it (the display must still be connected). If the error message disappears, the conductivity […]
Floating Combi Filter, how do I know if the UV-C lamp is still working?
If you take the Combi Filter out of the water and remove the outer jacket, you can see the UV lamp burning through filter foam. Of course, the Combi Filter must be connected. CAUTION! Do not look into the lamp up close and for too long!
